Contra Costa County property record for 390 Diablo Rd, Danville, CA 94526
| Property Type | Commercial Office |
|---|---|
| Details | 13,024 sqft · built 1979 |
| Lot Size | 0.98 acres (42,688 sqft) |
| Owner | Company Name on File |
| Last Sale | $2,750,000 (Dec 2001) |
| Tax Bill | $46,093 (2025) |
| Deeds & Mortgages | Sep 2017 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 196-210-054-9 |
| Primary APN | 196-210-054-9 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 13,024 sqft Gross Area |
| 1st Floor Area | 13,024 sqft |
| Year Built | Built 1979 |
|---|---|
| Effective Year Built | Effective 1980 |
| Lot Area | 42,688 sqft (0.98 acres) |
| Street Address | 390 DIABLO RD |
|---|---|
| City | DANVILLE |
| State | CA |
| Zip | 94526-3497 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Commercial Office |
| Legal Description | POR RO SAN RAMON |
| Legal Subdivision | MONTE GARDENS 06 |
| Legal Lot Number | 218 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3002 |
| Census Tract | 345203 |
390 Diablo Rd, a commercial property, is owned by a company that bought it in December 2001.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 2821 CROW CANYON RD, 210, SAN RAMON, CA 94583-1659 |
| Owner Type | Company |
| Vesting | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Dec 21, 2001 · Amount on File |
| Deed Sale | Dec 21, 2001 · Amount on File |
| Prior Sale | Jun 16, 1995 · Amount on File |
| Deed Document Number | 2001396897 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 390 DIABLO RD, DANVILLE, CA 94526-3497 |
| Transaction Type | Mortgage |
| Record Updated | Aug 5, 2022 |
| Title Company | PLACER TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000175632 |
|---|---|
| Date | Sep 26, 2017 |
| Instrument | 2017-175632 |
| Name | WESTAMERICA BANK |
|---|---|
| Type | Bank |
| Address | SUISUN CITY, CA 94585 |
| Type | Commercial Mortgage |
|---|---|
| Amount | Amount on Record |
The 2025 property tax bill for 390 Diablo Rd was $46,093.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Danville Town |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $2,850,000 (-28.55%) Land $1,750,000 Building $1,100,000 | |
| 2025 | $46,093.00 | $3,988,714 Land $2,215,952 Building $1,772,762 |
| 2023 | $46,385.00 (+5.15%) | $3,833,828 Land $2,129,904 Building $1,703,924 |
| 2022 | $44,115.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 390 Diablo Rd in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 5 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 390 Diablo Rd is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 398 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
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